Docs: Update some reusable block references to synced patterns.

In WordPress 6.3, [https://wordpress.org/documentation/article/reusable-blocks/ Reusable Blocks were renamed to Patterns]. A synced pattern will behave in exactly the same way as a reusable block.

This commit updates some references in DocBlocks and inline comments to use the new name.

Follow-up to [56030].

Props benjaminknox, oglekler, hellofromTonya, marybaum, nicolefurlan.
Fixes #59388.

git-svn-id: https://develop.svn.wordpress.org/trunk@57032 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/tests/blocks/renderReusable.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * Tests for reusable block rendering.
+ * Tests for synced pattern rendering.
  *
  * @package WordPress
  * @subpackage Blocks
@@ -83,7 +83,7 @@ class Tests_Blocks_RenderReusable extends WP_UnitTestCase {
 	}
 
 	/**
-	 * Make sure that a reusable block can be rendered twice in a row.
+	 * Make sure that a synced pattern can be rendered twice in a row.
 	 *
 	 * @ticket 52364
 	 */

tests/phpunit/tests/rest-api/rest-blocks-controller.php

@@ -98,7 +98,7 @@ class REST_Blocks_Controller_Test extends WP_UnitTestCase {
 
 	/**
 	 * Exhaustively check that each role either can or cannot create, edit,
-	 * update, and delete reusable blocks.
+	 * update, and delete synced patterns.
 	 *
 	 * @ticket 45098
 	 *